/* Emoji拖尾效果 */
.emoji-trail {
    position: absolute;
    font-size: 16px; /* 更小的emoji */
    pointer-events: none;
    user-select: none;
    opacity: 1;
    transition: opacity 0.3s ease-out, transform 0.3s ease-out; /* 更快的消失效果 */
}